Implementing Your Own Icons
Here’s a class that implements the Icon interface and uses ovals as simple icons:
import javax.swing.*;
import java.awt.*;
class OvalIcon implements Icon {
private int width, height;
public OvalIcon(int w, int h) {
width = w;
height = h;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.drawOval(x, y, width - 1, height - 1);
}
public int getIconWidth() {
return width;
}
public int getIconHeight() {
return height;
}
}
public class TestOval {
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label1 = new JLabel(new OvalIcon(20, 50));
JLabel label2 = new JLabel(new OvalIcon(50, 20));
JLabel label3 = new JLabel("Round!", new OvalIcon(60, 60),
SwingConstants.CENTER);
label3.setHorizontalTextPosition(SwingConstants.CENTER);
Container c = f.getContentPane();
c.setLayout(new FlowLayout());
c.add(label1);
c.add(label2);
c.add(label3);
f.pack();
f.setVisible(true);
}
}
